v5.0.1: Fix PostgreSQL COPY format, MySQL security, 8.0.22+ compat

Fixes from Opus code review:
- PostgreSQL: Use native TEXT format for COPY (matches FROM stdin header)
- MySQL: Escape backticks in restore to prevent SQL injection
- MySQL: Add SHOW BINARY LOG STATUS fallback for MySQL 8.0.22+
- Fix duration calculation to accurately track backup time

Updated messaging: We built our own machines - really big step.

main.go

@@ -16,7 +16,7 @@ import (
 
 // Build information (set by ldflags)
 var (
-	version   = "5.0.0"
+	version   = "5.0.1"
 	buildTime = "unknown"
 	gitCommit = "unknown"
 )